Changelog

Deprecated

• Deprecate unsafe legacy format in Solovay Kitaev (#15360)
• Deprecate annotated=None in control methods (#15356)

Added

• Add ways to retrieve operations from the QkTarget (#15283)
• Add Statevector.from_circuit to mirror Operator.from_circuit (#14981)
• Add PauliLindbladMap.parity_sample method (#15335)
• Support simple IfElseOp conditionals in OpenQASM 2 export (#14556)
• Add qk_dag_compose to the C API (#15329)
• Add ways to iterate over the Target in C. (#15208)
• Added Reverse topology iterator in DAG (#15060)
• Using Ross-Selinger in Qiskit (#15270)
• Allow user-specified unitary synthesis methods for Clifford+T transpilation (#14952)
• Add the argument fallback_on_default to UnitarySynthesis (#15287)
• Add qk_transpile_stage_routing() to the C API (#15358)
• Add substitute_node_with_dag to c api (#15374)
• Add qk_transpile_stage_optimization() to the C API (#15295)
• Enable commutation checks among Pauli-based gates (#15359)
• Add qk_transpile_stage_translation() to the C API (#15293)
• Add method wrappers for circuit and DAG converters (#15043)
• Add DAG copy-empty-like to the C API (#15320)
• Add qk_transpile_stage_layout() to the C API (#15241)
• Add SolovayKitaev as part of the default unitary synthesis plugin (#15285)
• Unified commutative optimization (#15047)
• Add instruction_supported to QkTarget. (#14566)
• Converting RX/RY/RZ rotations to {Clifford,T,Tdg} (#15321)
• Add QkDag instruction appliers and getter to C API (#15313)
• Add qk_dag_successors and qk_dag_predecessors to the C API (#15346)
• Expose both forms of VF2 layout passes in the C API (#14864)
• Add qk_circuit_to_dag and qk_dag_to_circuit to the C API (#15247)
• Adding qk_dag_topological_op_nodes to C API (#15297)
• Add qk_transpile_stage_init() to the C API (#15207)
• Port VF2PostLayout to Rust (#14863)
• Add UnitaryGate handling to QkDag C API (#15363)
• Add no-overhead ParameterExpression.num_parameters attribute (#15354)
• Split VF2 call_limit to before and after first layout (#14862)
• Extend LitinskiTransformation pass to handle measurements (#15217)
• Create PauliProductMeasurement instruction (#15126)
• Add DAG typed node support to C API. (#15206)
• Optimize the OptimizeCliffordT transpiler pass. (#14996)
• Expose Neighbors in the C API (#15236)
• Encapsulate VF2 configuration and return types (#14861)
• Add Clifford prepend gates internal methods to improve Clifford.dot (#15166)
• Add QkDag with registers to the C API. (#15200)
• Improve performance of quantum_info predicates (#15118)
• Add quantum volume generator function to C API (#15037)
• Add QkParam to the C API (#14837)
• Rust Implementation for using SparseObservable in sampled_expectation_value (#14516)
• Unbias directionality in VF2 priority queue (#14859)
• Handle VF2 coupling-map shuffling in Rust (#14860)
• Use QSD from rust in default unitary synthesis plugin (#15003)
• Make VF2 fully generic over index types and semantics (#14858)
• Use on-the-fly scoring in VF2Layout (#14857)
• Rust Shannon Decomposition (#14797)

Changed

• Move preferred location of WrapAngles default registry (#15101)
• Drop support for Python 3.9 (#15371)
• adding name to qktarget (#15334)
• Cleanup of circuit library control methods (#15209)
• Swap to setuptools>=77.0 licence specification (#15128)
• Drop macOS x86_64 to tier 2 (#15041)
• Lower limits on VF2PostLayout in exact mode (#15068)

Fixed

• Represent non-fixed params as NaN for QkTargetOp (#15463) (#15525)
• Fix param extraction for arrays with a single element (backport #15436) (#15522)
• QPY serialization of SparseObservable (#15263)
• Fix timeline drawer for gates without unitary in target (#15421)
• Stop using a parallel sort in disjoint utils (#15410)
• Bug fix for Clifford+T transpilation: passing incorrect argument to generate_unroll_3q (#15401)
• fix: preserve identity 'I' characters in PauliEvolutionGate labels (#15173)
• Fix operator @ quantumstate multiplication (#14963)
• Fix text drawer layering for classical wires (#15262)
• Pauli.evolve() recognize common rotations by (n*pi/2) as Clifford gates (#15289)
• Unitary synthesis bug fix (#15286)
• Change the rust structure of expr.Value (#15272)
• Fix reuse of ConsolidateBlocks instances (#15258)
• Fix qpy.dump failure with gzip write streams in QPY v16 (backward seek unsupported) (#15158)
• Raise exception not panic on bad ConsolidateBlocks input (#15110)
• Fix schedule analysis passes with empty circuits (#15147)
• Fix qubit mapping in ConsolidateBlocks control-flow blocks (#15083)
• Fixing inverse methods for MCPhase and MCU1 gates (#15181)
• Fix textdrawer for controlflow with different regs (#15155)
• Deepcopy BoxOp bodies when copying circuits (#14918)
• Fix incorrect mapping of ControlFlow block qargs in BasisTranslator (#15143)
• Check target gates are parameterized in optimize1qgatesdecomposition (#15131)
• Avoid panics in Optimize1qGatesDecomposition (#15117)
• Fix passmanager to preserve falsy pass outputs instead of reverting to input (#14943)
• Fix pickling of SabreSwap (#15074)
• Fix edge-order non-determinism when adding DAG nodes (#15040)
• Fix SparsePauliOp.is_unitary() to respect input tolerance values (#14676)
• Preserve registers in output TranspileLayout (#15024) (#15025)
• Preserve registers in output TranspileLayout (#15024)
• Fix variable remapping of Delay expressions in QuantumCircuit.compose (#15020) (#15023)
• Fix variable remapping of Delay expressions in QuantumCircuit.compose (#15020)
• fix: Statevector.to_dict(decimals= 3) does not round results and ignores the decimals keyword (#12113)
• Fix VF2PostLayout with uncoupled qubits in strict_direction=True (#14998) (#15001)
• Fix VF2PostLayout with uncoupled qubits in strict_direction=True (#14998)